I am about to dive into the VM world and had a few questions. Currently I am using a 2010 2.66 MacBook Pro 13" with 8GB of RAM running Snow Leopard. I plan to install Lion on an external drive soon and later install it into my computer. The question I have is, can I use Parallels on my Snow Leopard hard drive and Lion drive? I will be going back and forth between SL and Lion and want to know if its possible. Later on I will most likely make Lion permanent so should I keep it with Parallels? I know Parallels 6 is out, is 7 coming out soon? Should I purchase 6 now? Thanks for reading!